Psidium guajava is the scientific name of ___________.
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Anions are formed by _____.
The common name of dichlorodifluoromethane is _____.
The Chemical formula of Ammonium oxalate is _____.
Shortest day in the Northern hemisphere is _______.
Dodecahedron has 20 vertices. How many edges does it have?
Who among the following is the first Indian female gymnast ever to compete in the Olympics?
What was invented by J. B. Dunlop?